update missing helm chart version (#182)

Author: surajkota

hack/charts/namespaced/operator_chart/Chart.yaml

@@ -1,7 +1,7 @@
 apiVersion: v1
 name: amazon-sagemaker-operator-for-k8s-install-operator
 version: 1.0.0
-appVersion: 1.2.0
+appVersion: 1.2.1
 description: A Helm chart for deploying the Amazon SageMaker Operator to a specified namespace for Kubernetes using EKS IAM roles for service accounts.
 maintainers:
  - name: Gautam Kumar